AA 400 then AA 1273 at Miami
Charlotte → Miami → Atlanta
Timetable, Miami time
18:51AA 400 from Charlotte at the gate
21:50AA 1273 to Atlanta leaves the gate
2 h 59 apart on the timetable
The last days
AA 400 and AA 1273 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.